This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A127892 #15 Feb 03 2021 13:58:14 %S A127892 7,97,997,9967,99643,998443,9986113,99979337,999962683,9987983617, %T A127892 99978397283,999631686353,9997564326947,99769267986197, %U A127892 999769267986197,9957969395462467,99957969395462467,992429121339693967,8963315421273233617,86312646216567629137 %N A127892 Largest n-digit left-truncatable prime. %C A127892 Ends at a(24) = 357686312646216567629137. %H A127892 Ray Chandler, <a href="/A127892/b127892.txt">Table of n, a(n) for n = 1..24</a> %H A127892 I. O. Angell and H. J. Godwin, <a href="http://dx.doi.org/10.1090/S0025-5718-1977-0427213-2">On Truncatable Primes</a>, Math. Comput. 31, 265-267, 1977. %H A127892 <a href="/index/Tri#tprime">Index entries for sequences related to truncatable primes</a> %Y A127892 Cf. A024785, A050987, A127891. %K A127892 base,nonn,fini,full %O A127892 1,1 %A A127892 _Ray Chandler_, Feb 04 2007